Pitman connection.



H. B. SPERRY.

PITMAN CONNECTION.

APPLICATION FILED APR. 10. 1916.

Patented Aug. 5, 1919.

, Lmmm JEarbzzrziB. Sperry.

UNITED S S PATENT OFFICE HERBERT B. sPEnnY, or. enicesofittinors, lassrettoarr lissienivrnnrs, to mTEnNATIonALjnnnvnsrnnooiurnnr, aeoiarfonarron OF NEW JERSEY.

v PITMAN connection To -1.12 whom it may concern: Be it known that I, HERBERT B. S rnnny, a citizen of the United States,res1d1ng at Chicago, in the county of-Gookiand State of Illinois, have invented certain new and useful Improvements in P tnran ,Connections, of which the following is a full, clear;

and exact specificatiom My invention relates to pitmaneonnections, and comprises automatically actuated means operative to retalinthe: coupling elements in close engagement as their meeting surfaces become wornby arelative :movement thereof. a 1. 1 The object of my inventionisto provide an improved construction and connectible members specially adapted for coupling the pitman of a mower to the ,kn iferhead, wherein the requirements are such that the pitman must have a free movement iaxially upon the connecting member of the knife head and the knife head a free. movement in the direction of tilt of the finger bar. and the connecting members be kept adjusted in close engagement as wear occurs, and to provide means whereby a proper engagement of the parts is maintained:automatie cally although a comparatively large amount of wear has developed by constant operation of the mechanism.

These objects are attained by means of the mechanism illustrated in the accompany ing drawings, in whichi Figure 1 is a top plan vlew of a pitman and knife connection for a mower and emm bodying my invention; a a

Fig. 2 is'a front elevation ofFig. 1; and

Fig. 3 is a vertical section on line AB of Fig. 1.

The same reference characters designate like parts throughout theseveral views, a

1 represents the knife head secured to a knife back 2, to which are secured toe sections 3. The head is provided with a relatively wide base at and a vertical longitudinally disposed flange 5 terminating at its stubbleward end in a forwardly extending barrel member 6, having a semi-spherical 8 reprehead portion 7 at its front end. sents the body of a pit-man, having secured thereto, by means of rivets 9, a shank 10, terminating at its free end in an annular cup-shaped member 11 adapted to receive the head 7 of the barrel member 6, and 12 a threaded bolt provided with a semif fi nf La "Patent. PatentedAug. 5,1919.

Application filett April 10, 1916. Serial No. 90,117. i i

spherical head 13 and a nut .14, having an abutting-change.15 thereon. The head of theboltis received bywthe barrel member 6 and is turnablewvithin its semispherical head portion 7, and 16 represents a transverse slot across the head of the bolt whereby it may be secured against. rotation when the; nut lt is adjusted. The opening 17 in the front side ofwthe cup-shaped member 11 ofthe shank 10 is large enough to permit it to be passed over the flange 15 and in engagement with the head 13.

HMeansare provided for securingthe cupshaped member of the pitmair shank in engagement with the coacting member of the knife head and to automatically retain them in proper operative relationas they become worn by use, including a wedge memberlS carried by an arm 19 pivotally mounted upon astud EZOsecured to the pitman 8 and provided with a concentric slot Qladapted to receive the .bodyof thebolt 12, thewedge being disposed between the flange 15 of 1 the pitman, and 26. coiled compression spring reactive between the eye and a collar 27 on the link in a manner l to turn the arm 19 about its pivot ililflz direction to move'the wedge 18 downward in amanner to take up any wear-of the connected. parts. The airis of the arm 18 is disposed at right I angles to the axis of theupitman and parallel with: the axis of the cup-shaped member 11. When it is desiredto disconnect the pirtman from the knife head, the Wedge and its carrying arm are turned upward by means of the finger engaging member 28, as shown in dottel lines in Fig. 2. When in that position a link sustaining pintle 29 onthe arm 19 engages with the shanlt' ldina mannerto limit an upward swing of the arm, and the extension 22*of the arm carries the gr assward end of the link 24 downward until the axis of its laterally turned end 23 is below an imaginary line drawn through the axis of the stud 20 and the eye member 25, whereby the reactive force of the spring 26 yieldingly retains the wedge and its carrying arm in a raised position.

' sociated parts without departing from the spi'ritof my invention as indicated in the appended claims.

lVhat I claim as my invention, and desire to secure by Letters Patent, is: 1. A pitman connection including a ball and socket joint, means movable in a plane transverse to the longitudinal axis ofthe pitman for taking'up the wear on said omt, and toggle mechanism for actuating said take-up means.

. 2.1.,A pitman connection including a ball and socketjoint, take-up mechanism includ ing a wedgevmovable at'right angles to the lon itudinal axis of the pitman, and= toggle mechanism for actuating said Wedge.

8. A pitman. connection including a ball and socket joint, means including a member pivoted on the pitman and having an inclined bearing surface for taking up the wear .on said joint,.and toggle mechanism for actuating said means. L'A pitman connection including coacting spherical bearing surfaces, means movable in aplane transverse to the longitudinal axis of the pitman for forcing said sur faces into bearing contact, and toggle mechanism for actuating said means.

, I '5. Apitman connection including a ball and socket joint, pivoted means extending through said joint for forcing the members of said joint into contact with each other, and spring controlled means for actuating said first mentioned means.

6.,A pitman connection including a ball and socket joint, a clamping bolt extending through said joint, and toggle controlled means cooperatingv with said bolt to take up the wear on said joint.

'7. A pitman connection having a ball and 7 socket j oint,ra clamping bolt for closing said joint, a lever pivoted to the pitman and having an inclined bearing surface on one end, abutting means carried by said bolt adapted to contact with the inclined bearing surface of said lever, and resilient means for actuating said lever.

'8. In combination, a pitman including an annular cup-shaped shank, a separable ele- -ment coactable therewith and including a Copies of this pa ient may be obtained'for barrel member provided with a semi-spherical head adapted to be received by said cupshaped shank, a bolt having a se1nispherical head received by the head of said barrel member, an abutting element carried by the opposite end of said bolt, and a wedge movable at right angles to the longitudinal axis of said pitman and adapted to coact with said abutting element and said shank in a manner to retain said shank in ope ative engagement with said separable coactin element.

9. In combination, a pitman including an annular cup-shaped shank, a separable element coactable therewith and inchuling a barrel member provided with a semi-spherical head adapted to be received by said cupshaped shank, a bolt having a semi-sphcrical head received by the head of said barrel member, an abutting element carried by the opposite end of said bolt, an arm pivotally mounted upon said pitman and having its axis at right angles with the longitudinal axis thereof, and a wedge member carried by said arm and adapted to coact with said abutting element and said shank in a. inanner to retain said shank in operative engagement with said separable coacting element.

10. In combination, a pitman including an annular cup-shaped shank, a separable element coactable therewith and including a barrel member provided with a semi-spherical head adapted to be received by said cupshaped shank, a bolt having a semi-spherical head received by the head of said barrel member, an abutting element carried by the opposite end of said bolt, an arm pivotallv mounted upon said pitman and having its axis at right angles with the longitudinal axis thereof, a wedge member carried by said arm and provided with an open slot adapted to receive the body of said bolt, said Wedge coacting with said abutting element and said shank in a manner to retain said shank in operative engagement with said separable coacting element, and a spring carried by said pitman and reacting to normally move said wedge in a downward direction.

In testimony whereof I afiix my signature, in the presence of two witnesses.

GEO. W. Nam,

F. Koinv'rz.

five cents each, by addressing the Commissioner of Patents. Washington, D. G." 

